Single crystal casting of gas turbine blades using superior ceramic core
A ceramic core employed in a single-crystal casting process should endure for a long time at casting temperatures above 1500 °C. Therefore, in this work, an inorganic binder was applied to a conventional injection-molding method to produce a core having enough strength during the casting process. Th...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785419319192 |
| _version_ | 1811212011826053120 |
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| author | Eun-Hee Kim Hye Yeong Park Cho-long Lee Jong Bum Park SeungCheol Yang Yeon-Gil Jung |
| author_facet | Eun-Hee Kim Hye Yeong Park Cho-long Lee Jong Bum Park SeungCheol Yang Yeon-Gil Jung |
| author_sort | Eun-Hee Kim |
| collection | DOAJ |
| description | A ceramic core employed in a single-crystal casting process should endure for a long time at casting temperatures above 1500 °C. Therefore, in this work, an inorganic binder was applied to a conventional injection-molding method to produce a core having enough strength during the casting process. The starting powders for the ceramic core used a mixture of three kinds of fused silica with particle sizes of 117 μm, 33 μm, and 17 μm, zircon flour of 10 μm, and silicon carbide of 16 μm. The mixed ceramic powder was coated with a silica precursor and then dried at 80 °C for 1 h. The dried powder was mixed with wax and injection molded. The injected ceramic core was heat-treated at 1200 and 1500 °C for 1 h,and then reheated at 1550 °C for 3 h. The heat treatment at 1550 °C was conducted to investigate the applicability of the core coated with the inorganic binder in the casting process. The inorganic binder-coated core with a superior firing strength had no cracks or surface defects after the heat treatment, compared with the core without the inorganic binder. In addition, the turbine blade of 150 mm length was well cast as a single crystal and the internal core was completely eluted. |
| first_indexed | 2024-04-12T05:22:46Z |
| format | Article |
| id | doaj.art-b42ab839040c4859ada95ac7fccafc85 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-12T05:22:46Z |
| publishDate | 2020-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b42ab839040c4859ada95ac7fccafc852022-12-22T03:46:25ZengElsevierJournal of Materials Research and Technology2238-78542020-05-019333483356Single crystal casting of gas turbine blades using superior ceramic coreEun-Hee Kim0Hye Yeong Park1Cho-long Lee2Jong Bum Park3SeungCheol Yang4Yeon-Gil Jung5School of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 51140, Republic of KoreaSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 51140, Republic of KoreaChungji Corporation, 1022 Gyeongchung-Daero, Ganam-Eup, Yeoju-Si, Gyeonggi-Do, Republic of KoreaDong-A Special Metal, 769-37 Songsanro, Daesan-myun, Haman-gun, Gyeongnam, Republic of KoreaSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 51140, Republic of KoreaCorresponding author.; School of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 51140, Republic of KoreaA ceramic core employed in a single-crystal casting process should endure for a long time at casting temperatures above 1500 °C. Therefore, in this work, an inorganic binder was applied to a conventional injection-molding method to produce a core having enough strength during the casting process. The starting powders for the ceramic core used a mixture of three kinds of fused silica with particle sizes of 117 μm, 33 μm, and 17 μm, zircon flour of 10 μm, and silicon carbide of 16 μm. The mixed ceramic powder was coated with a silica precursor and then dried at 80 °C for 1 h. The dried powder was mixed with wax and injection molded. The injected ceramic core was heat-treated at 1200 and 1500 °C for 1 h,and then reheated at 1550 °C for 3 h. The heat treatment at 1550 °C was conducted to investigate the applicability of the core coated with the inorganic binder in the casting process. The inorganic binder-coated core with a superior firing strength had no cracks or surface defects after the heat treatment, compared with the core without the inorganic binder. In addition, the turbine blade of 150 mm length was well cast as a single crystal and the internal core was completely eluted.http://www.sciencedirect.com/science/article/pii/S2238785419319192Ceramic coreInorganic binderSingle crystalTurbine bladeStrength. |
| spellingShingle | Eun-Hee Kim Hye Yeong Park Cho-long Lee Jong Bum Park SeungCheol Yang Yeon-Gil Jung Single crystal casting of gas turbine blades using superior ceramic core Journal of Materials Research and Technology Ceramic core Inorganic binder Single crystal Turbine blade Strength. |
| title | Single crystal casting of gas turbine blades using superior ceramic core |
| title_full | Single crystal casting of gas turbine blades using superior ceramic core |
| title_fullStr | Single crystal casting of gas turbine blades using superior ceramic core |
| title_full_unstemmed | Single crystal casting of gas turbine blades using superior ceramic core |
| title_short | Single crystal casting of gas turbine blades using superior ceramic core |
| title_sort | single crystal casting of gas turbine blades using superior ceramic core |
| topic | Ceramic core Inorganic binder Single crystal Turbine blade Strength. |
| url | http://www.sciencedirect.com/science/article/pii/S2238785419319192 |
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